Full movie description "Rawhide Incident at Sulphur Creek":

Horse thieves who have victimized Comanches also strike the drive's ramuda. Gil sends a group headed by Pete and Rowdy out to purchase replacement mounts. They encounter a preacher on his way to officiate a christening at the Lacey ranch, where he says horses are for sale. The drovers find their own stolen horses corralled there. So do the Comanches, who put the ranch under siege.